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Woodward 8915-864

Product Name:​ Woodward 8915-864 — 1907 Large Liquid Valve & Actuator Assembly
Product Description:​ The 8915-864 is a 1907 Large Liquid Valve and Actuator assembly for precision gas turbine liquid fuel metering. It is functionally equivalent to the 8915-815 and 8915-839 assemblies, comprising the 1907 large liquid fuel valve with an integrated TM-55 integrating actuator or equivalent positioning mechanism.
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Technical Specifications:
  • Metered Fuel Flow: 30:1 turndown, maximum 11,340 kg/h (25,000 lb/h)
  • Minimum Fuel Flow: 68 kg/h (150 lb/h)
  • Fuel Inlet Pressure (Maximum): 9,377 kPa (aluminum body) / 17,238 kPa (stainless steel body)
  • Differential Pressure: 345 to 827 kPa
  • Fuel Viscosity: 0.5 to 12.0 centistokes
  • Fuel Specific Gravity: 0.77 to 0.91
  • Cleanliness: 20 μm filtration, water ≤0.1%, particulates ≤1.0 mg/L
TM-55 Actuator Specifications (when equipped):
  • Aluminum case with through-hardened stainless steel internal parts
  • Electric signal converted to hydraulic pressure for mechanical response
  • Electrical position feedback transducer reports exact actuator output shaft and fuel valve location
  • UL approved for Class I, Division 1 hazardous environment operation
Fuel Compatibility:​ Diesels, kerosenes, gasolines, light/heavy distillates, naphtha, gas turbine fuels, fuel oils, biodiesel (FKM compatible).
Functional Features:
  • Differential pressure regulation for constant flow delivery
  • Exact valve positioning across full range of demands when paired with Woodward electronic control
  • Hazardous area certification (Class I, Div 1) for the TM-55 actuator variant
Application Scenarios:​ Gas turbine liquid fuel control in hazardous environments, power generation, oil & gas production, marine propulsion.
Material Composition:​ Aluminum or stainless steel valve body; through-hardened stainless steel actuator internals; FKM seals.
Working Principle:​ The electronic control sends a signal to the TM-55 actuator, which converts the electrical signal into hydraulic pressure causing mechanical response to position the fuel valve. An electrical position feedback transducer reports the exact location back to the control system, forming a closed loop.
Installation Requirements:
  • Read entire manual and all related publications before installing
  • Practice all plant and safety instructions
  • Use proper hydraulic fluid per specifications
  • Install valve square with actuator linkage to prevent binding
  • Allocate actuator travel: two-thirds between min/max, remaining third split at endpoints
  • Follow outline drawing for dimensional requirements
Usage Precautions:
  • Maintain fuel filtration at 20 μm or finer
  • Limit water content to 0.1% by volume; solids to 1.0 mg per liter
  • Any unauthorized modifications or use outside specified limits constitutes misuse, voids warranty, and invalidates certifications
  • Failure to follow instructions can cause personal injury and/or property damage

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